1、BRITISH STANDARDBS EN ISO 1805:2006Fishing nets Determination of breaking force and knot breaking force of netting yarnsThe European Standard EN ISO 1805:2006 has the status of a British StandardICS 65.150g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49
2、g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 1805:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006ISBN 0 580 49883 2National forewordThis Briti
3、sh Standard was published by BSI. It is the UK implementation of EN ISO 1805:2006. The UK participation in its preparation was entrusted to Technical Committee TCI/77, Ropes and cordage and fishing nets.A list of organizations represented on TCI/77 can be obtained on request to its secretary.This pu
4、blication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPEN
5、NEEUROPISCHE NORMEN ISO 1805November 2006ICS 65.150English VersionFishing nets - Determination of breaking force and knot breakingforce of netting yarns (ISO 1805:2006)Filets de pche - Dtermination de la force de rupture et dela force de rupture au noeud des fils pour filets (ISO1805:2006)Fischnetze
6、 - Bestimmung der Hchstzugkraft und derKnotenhchstzugkraft von Netzgarn (ISO 1805:2006)This European Standard was approved by CEN on 25 October 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of
7、 a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version
8、in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Fin
9、land, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMIT
10、EE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 1805:2006: EForeword This document (EN ISO 1805:2006) has been prepared by Technical Committee CEN/TC 248 “T
11、extiles and textile products“, the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 38 “Textiles“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2007, an
12、d conflicting national standards shall be withdrawn at the latest by May 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia,
13、 Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 1805:2006Reference numberISO 1805:2006(E)INTERNATIONAL STANDARD ISO1805
14、Second edition2006-11-15Fishing nets Determination of breaking force and knot breaking force of netting yarns Filets de pche Dtermination de la force de rupture et de la force de rupture au noeud des fils pour filets EN ISO 1805:2006ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references
15、. 1 3 Terms and definitions. 1 4 Principle. 2 5 Apparatus 2 6 Sampling 3 7 Preparation of samples 3 8 Requirements for testing . 4 9 Number of tests. 4 10 Test procedure 4 11 Calculation and expression of results 5 12 Test report . 6 EN ISO 1805:2006iv Foreword ISO (the International Organization fo
16、r Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the
17、 right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Internati
18、onal Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication
19、as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
20、ISO 1805 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 248, Textiles and textile products, in collaboration with Technical Committee ISO/TC 38, Textiles, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). Th
21、is second edition cancels and replaces the first edition (ISO 1805:1973), of which it constitutes a technical revision. EN ISO 1805:20061Fishing nets Determination of breaking force and knot breaking force of netting yarns 1 Scope This International Standard specifies a method of testing the breakin
22、g force and knot breaking force of netting yarns for fishing nets. Tests may be carried out in both the dry and wet states, but tests in the wet state on the knotted yarn are considered to be particularly appropriate in indicating the behaviour of the yarn in use. 2 Normative references The followin
23、g referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 139, Textiles Standard atmospheres for conditioning and t
24、esting ISO 858, Fishing nets Designation of netting yarns in the Tex system 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 breaking force force, equal to the maximum force observed during a breaking test NOTE Distinction is mad
25、e between the dry yarn breaking force, the wet yarn breaking force, the dry knot breaking force, the wet knot breaking force. 3.2 force at rupture final force at the moment that the specimen or the first component of the specimen breaks at, or after, attainment of the breaking force NOTE The force a
26、t rupture is usually, but not always, identical to the breaking force. EN ISO 1805:20062 3.3 tenacity breaking force per unit resultant linear density of the unstrained specimen in the conditioned state 3.4 breaking length calculated length of a specimen whose conditioned weight exercises a force eq
27、ual to its breaking force 3.5 time-to-break time taken to reach the breaking force, measured from the moment of application of the force NOTE The time-to-break is expressed in seconds. 4 Principle A length of yarn is extended in the dry or wet state until it reaches the load at rupture. The test is
28、performed using a suitable apparatus that records or indicates the applied force 5 Apparatus 5.1 Tensile testing machine. 5.1.1 Any of the following types may be used: a) constant rate of elongation machine; b) constant rate of load machine; c) constant rate of traverse machine. Preference should be
29、 given to a constant rate of elongation machine. 5.1.2 All tensile testing machines shall include a pair of suitable devices to hold the sample, a means of applying force or elongating the sample at suitable rates, and a force-indicating mechanism which will indicate or continuously record the force
30、 applied to the sample. For determining the breaking force of netting yarns without knots, the samples shall be mounted in special holding devices, for example, of the types shown in Figure 1, to avoid slipping of the samples or breaking due to damage caused by the holding devices. EN ISO 1805:20063
31、Figure 1 Holding devices for the testing of netting yarns without knots 5.1.3 The maximum error of the indicated force at any point in the range in which the machine is used shall not exceed 1 %. Check the accuracy of the graduated scale of the apparatus dynamically, for example, by means of calibra
32、ted springs of appropriate characteristics. 5.1.4 The testing machine shall be capable of testing samples having a nominal gauge length of at least 250 mm. 5.1.5 All testing machines shall include facilities for producing different rates of loading in order to break samples in the specified average
33、time-to-break. 5.2 Equipment for producing and maintaining the standard atmosphere for testing. See 8.1. 5.3 Equipment in which specimens can be immersed in water preparatory to wet testing. 5.4 Stop-watch or interval timer. 6 Sampling Sampling shall be carried out in accordance with recognized nati
34、onal standards or in a manner agreed between the parties concerned. 7 Preparation of samples The samples shall be removed from the package before exposure in the standard atmosphere for testing, or before immersing in water, in such a manner that there is no alteration in the twist. EN ISO 1805:2006
35、4 8 Requirements for testing 8.1 Atmosphere for testing All samples to be tested in the dry state shall be exposed to the standard atmosphere for testing as described in ISO 139, until they have reached equilibrium. For netting yarns of man-made fibres, a period of 24 h exposure is generally suffici
36、ent. Where it is not possible to carry out the tests in the standard atmosphere, the tests shall be carried out immediately after removal of the samples from the standard atmosphere. 8.2 Testing in the wet state 8.2.1 All samples to be tested in the wet state shall be immersed in tap water, without
37、wetting agents, at a temperature of (20 2) C for a period of not less than 12 h. Surplus water shall be shaken off. 8.2.2 By agreement between the parties, a shorter wetting time with the addition of a wetting agent shall be used. The specimens are immersed for 1 h in solution of wetting agent in wa
38、ter at a temperature of (20 2) C. A shorter time of immersion is allowed, if it can be shown that the specimen is completely wetted in less than 1 h. 8.3 Distance between the holding devices The free length of the sample between the holding devices shall be at least 250 mm. 8.4 Time-to-break The mea
39、n duration of the test shall be (20 3) s. It shall be determined by preliminary tests. Where this time cannot be obtained due to limitations of the apparatus and/or the holding devices, the duration of the test may be (30 3) s or (60 6) s. This shall be recorded in the test report. 9 Number of tests
40、 At least ten single valid tests on each sample package shall be carried out. If a distinct confidence interval for the mean value is prescribed, as many additional tests shall be carried out as necessary to secure this confidence interval. 10 Test procedure 10.1 General 10.1.1 Check that the distan
41、ce between the holding devices is at least 250 mm (see 8.3). 10.1.2 Mount the sample in the testing machine so that the axis of the sample is parallel to and coincidental with the direction of the applied force. 10.1.3 Wet samples shall be tested immediately after removal from the water (see 8.2). 1
42、0.1.4 Apply the force to reach the prescribed mean time-to-break. 10.1.5 Discard all observations obtained on samples that slip between the holding devices or break due to damage caused by the holding devices. The number of observations discarded as directed above shall be noted. EN ISO 1805:2006510
43、.1.6 If any component breaks before the breaking force is reached, this fact shall be recorded in the test report. 10.2 Knotted netting yarns in the dry and wet states 10.2.1 All knots shall be made immediately before testing and gently tightened by hand. Precautions shall be taken to ensure that th
44、e twist is not altered. 10.2.2 Samples shall be tested with the weavers knot. All four ends of the weavers knot shall be fastened in the holding devices. Each holding device holds the two ends of the same yarn of approximately the same length (see Figure 2). 10.2.3 If a sample does not break at the
45、knot, the test shall be discarded. Figure 2 Weavers knot 11 Calculation and expression of results 11.1 Average breaking force, in decanewtons (daN), is equal to sum of observed breaking forces, in decanewtons (daN)number of observationsCalculate the average breaking force to four significant figures
46、 and round it off to three significant figures. 11.2 Average tenacity, in centinewtons per tex, is equal to average breaking force, in centinewtons (cN)average resultant linear density, in tex, of conditioned sampleCalculate the average tenacity to four significant figures and round it off to three
47、significant figures. 11.3 Breaking length, in kilometres, is equal to average breaking force, in decanewtons (daN)average resultant linear density, in kilotex, of conditioned sampleCalculate the average breaking length to four significant figures and round it off to three significant figures. 11.4 I
48、f necessary, the coefficient of variation and the confidence interval shall be calculated by a recognized statistical method. EN ISO 1805:20066 12 Test report The test report shall specify the following: a) a statement that the tests were performed in according with this International Standard; b) t
49、he date of the test; c) the type, linear density, size and direction of final twist of the netting yarn (see ISO 858); d) the type and capacity of testing machine used, the type of holding devices employed and the range of indication; e) the sampling method employed; f) the number of samples tested; g) the number of irregular tests; h) the kind and time of wetting (with or without wetting agents); i) the average breaking force in decanewtons (daN); j) any deviation from the specified test procedure. If it is required, the test report shal
